With Disney's fan-focused D23 Expo happening this weekend, we were sure to hear the latest on Pixar projects by way of those in attendance. And indeed at the event today, the studio announced updated cast information on a few of its upcoming features, namely The Good Dinosaur, Inside Out and the Finding Nemo sequel Finding Dory. Jokes were made during the announcements regarding Bill Hader's name appearing on two of the rosters. He also voiced a character in the recent Pixar feature Monsters University, as well as two of this year's non-Disney films: Turbo and Cloudy with a Chance of Meatballs.

The Good Dinosaur- The next Pixar release, due on May 30, 2014, this is the first solo effort from director Bob Peterson (codirector of Up) and depicts a speculative story of the dinosaurs if they hadn't been made extinct by an asteroid collision with Earth. The focus is on omnivores who farm the land, specifically a family of apatosaurs, and their voice actors have been now named as John Lithgow (dad), Frances McDormand (mom), Judy Greer (daughter Ivy) and Hader, Neil Patrick Harris and Lucas Neff (sons Forrest, Cliff and Arlo). The last of the boys is the main protagonist, who goes on an adventure with a cave man child named Spot.

Inside Out- Directed by Pete Docter (Up) and set for release on June 19, 2015, this is the story of the emotions that live inside an 11-year-old girl. Like what they've done in the past making characters out of toys, bugs, fish and vehicles, now we've got anthropomorphized anger, happiness, etc. For "Anger," perfectly, the voice will be Lewis Black. "Disgust" will be played by Mindy Kaling, "Sadness" will be portrayed by her The Office costar Phyllis Smith, "Fear" is Hader and "Joy" is fellow SNL alum Amy Poehler. The film will also show the emotions of the girl's parents, and overall the plot sounds complex and surreal, yet also sort of familiar if you read Roger Hargreaves' "Mr. Men" books or watched the TV series Herman's Head.

Finding Dory- We already knew that Albert Brooks and Ellen DeGeneres would reprise their vocal roles in Andrew Stanton's follow-up, due in theaters November 25, 2015. But obviously they're going to introduce new characters of the sea that we haven't met before, including Dory's parents, who will be voiced by Eugene Levy and Diane Keaton. Ty Burrell is also on board portraying a comical beluga whale named Bailey. The latest details on the plot are that Dory (DeGeneres) is looking for her family while Marlin (Brooks) and son Nemo (Alexander Gould returning?) are in turn looking for her. See the first piece of concept art below.

Update: Here's more of what we learned about future Disney Animation and Pixar releases from D23:

Everyone's favorite villainous actor Tom Hiddleston was announced to voice a young Captain Hook in a Peter Pan/Tinkerbell franchise prequel titled The Pirate Fairy. Mad Men's Christina Hendricks is voicing the main character, a bad fairy with red hair (because the cartoon drapes must match those in real life apparently) in love with the man who would be Hook. Tinkerbell (Mae Whitman) is the main heroine, of course. Releases Spring 2014.

Another Tinkerbell movie titled The Legend of the NeverBeast will arrive in Spring 2015 and deal with a menacing-looking yet very sweet creature that scares the fairies when he arrives in Pixie Hollow.

Coming in 2016 is a new feature from Walt Disney Animation Studios currently titled Zootopia. Directed by Byron Howard (Tangled), the film will imaginatively depict what a city designed by animals might look like, and the plot will be some sort of buddy comedy involving a fox and a rabbit. Other main characters include a gazelle, a porcupine and some wildebeasts.

The Walt Disney Animation Studios' first Marvel adaptation, Big Hero 6, will be about a new team of crimefighters who band together to foil a plot to destroy the city of San Fransokyo. This computer-animated comic book movie opens November 7, 2014.

A sequel to the new movie Planes is set to release on July 18, 2014, will be titled Planes: Fire & Rescue. Dane Cook will return to voice the main character, who now fights wildfires, and TV's Julie Bowen will also lend her voice to a role.

A new six-minute Monsters Inc./University short titled Party Central will play ahead of The Good Dinosaur when the PIxar feature hits theaters next year.

The Toy Story short/TV special Toy Story of TERROR! airs on ABC on October 16, 2013, and features the gang on a road trip and stopping at a mysterious motel.

According to the LA Times (and not announced at D23), Pixar has changed the ending of Finding Dory in response to the new documentary Blackfish, which is about the horrors of marine animal captivity. Apparently the animated film was to feature characters living in a SeaWorld type park at the end, but now they will be given a choice to leave and return to the ocean. John Lasseter is said to have feared Dory would become Pixar's Song of the South in time.

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